.vidbacking-active-body-back {
    position: fixed;
    z-index: -100;
    min-width: 100%;
    min-height: 100%;
    top: 50%;
    left: 50%;
    background-size: cover;
    overflow: hidden;
    opacity: 1;
    transition: 2s opacity;
    transform: translateX(-50%) translateY(-50%);
}

.vidbacking-active-block-back {
    position: absolute;
    min-width: 100%;
    min-height: 100%;
    height: auto;
    width: auto;
    z-index: -100;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
}

.vidbacking {
    display: none;
}

.vidmask-body-back {
    /*background: url(videooverlay1.png) repeat;*/
    opacity: 0.4;
    min-height: 100%;
    min-width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: -50;
    display: block;
}

.vidmask-block-back {
    /*background: url(videooverlay1.png) repeat;*/
    opacity: 1;
    min-height: 100%;
    min-width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    height: auto;
    width: auto;
    z-index: -50;
    display: block;
}